[Pharmacokinetics of sodium 4-[alpha-hydroxy-5-(1-imidazolyl)-2-methylbenzyl]-3,5-dimethylbenzoate (Y-20811), a new thromboxane synthetase inhibitor. I. Isolation and structure elucidation of urinary metabolite in dog].

The urinary metabolites of sodium 4-[alpha-hydroxy-5-(1-imidazolyl)-2-methylbenzyl]-3,5-dimethylbenzoat e (Y-20811) in dog were investigated. The main metabolite was isolated by high performance liquid chromatography and subsequent preparative thin layer chromatography. The structure of this metabolite was established as 4-[alpha-hydroxy-2-hydroxymethyl-5-(1-imidazolyl)benzyl]-3,5- dimethylbenzoic acid on the basis of spectral analyses and confirmed by its total synthesis.